Intense debate of the topic is expected during a Congressional hearing Wednesday.
The plant is intended to replace a temporary system established to treat nearly 600 gallons of water draining from the mine every minute.
- The EPA released the results Tuesday, two months after farmers and Navajo officials said the water delivered by a contractor contained oil.Read more
- President Russell Begaye says he requested a preliminary damage assessment from the Federal Emergency Management Agency on Thursday.Read more
- The fast pace for the contract is important because temperatures at the mine site can fall so low during winter that it's unsafe to treat the water manually, says the agency.Read more
- Researchers say they found patches of discolored sludge containing elevated levels of iron, copper, zinc, arsenic and lead.Read more
- Work has stopped at four Colorado mines following the August blowout.Read more
Republicans accused the EPA of not scrutinizing its own actions as closely it would a similar incident caused by private enterprise.
Workers were delayed in issuing a warning about the spill because they were trying to escape it, documents say.